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Andropova US, Aysin RR, Serenko OA, Ershova TO, Anisimov AA, Chernik VN. Ladder Polyphenylsilsesquioxanes and Their Niobium-Siloxane Composite as Coating Materials: Spectroscopy and Atomic Oxygen Resistance Study. Polymers (Basel) 2023; 15:3299. [PMID: 37571193 PMCID: PMC10422322 DOI: 10.3390/polym15153299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/29/2023] [Accepted: 08/02/2023] [Indexed: 08/13/2023] Open
Abstract
In order to expand the range of materials that can be used in outer space and in development of small spacecraft, ladder polyphenylsilsesquioxanes with different molar weights and the Nb-siloxane composites based on them were studied. The properties of the polymer films were studied, including tests in an oxygen plasma flow. Both initial and filled ladder polymers feature extremely low erosion coefficients in the region of 10-26 cm3/atom O at a high fluence of atomic oxygen of 1.0 × 1021 atom O/cm2. Ladder polyphenylsilsesquioxane films irradiated with atomic oxygen (AO) retain their integrity, do not crack, and exhibit good optical properties, in particular, a high transmittance. The latter slightly decreases during AO exposure. The Nb-siloxane filling retains the AO resistance and slight decrease in optical transmission due to diffuse scattering on the formed Nb-[(SiO)x] nanoparticles. Ladder polyphenylsilsesquioxanes demonstrate their suitability for creating protective, optically transparent coatings for small spacecraft that are resistant to the erosive effects of incoming oxygen plasma.
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Affiliation(s)
- Ulyana S. Andropova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia; (U.S.A.); (T.O.E.); (A.A.A.)
| | - Rinat R. Aysin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia; (U.S.A.); (T.O.E.); (A.A.A.)
| | - Olga A. Serenko
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia; (U.S.A.); (T.O.E.); (A.A.A.)
| | - Tatyana O. Ershova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia; (U.S.A.); (T.O.E.); (A.A.A.)
| | - Anton A. Anisimov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia; (U.S.A.); (T.O.E.); (A.A.A.)
| | - Vladimir N. Chernik
- D. V. Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia;
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Anokhina TS, Ershova TO, Anisimov AA, Temnikov MN, Grushevenko EA, Borisov IL, Volkov AV, Muzafarov AM. Pervaporation and Gas Separation Properties of High-Molecular Ladder-like Polyphenylsilsesquioxanes. Polymers (Basel) 2023; 15:3277. [PMID: 37571171 PMCID: PMC10422331 DOI: 10.3390/polym15153277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/25/2023] [Accepted: 07/29/2023] [Indexed: 08/13/2023] Open
Abstract
This paper presents the results of studies on the pervaporation properties (for benzene/hexane mixtures) and gas permeability (for He, H2, N2, O2, CO2, CH4, C2H6, and C4H10) of ladder-like polyphenylsesquioxanes (L-PPSQ) with improved physical and chemical properties. These polymers were obtained by condensation of cis-tetraphenylcyclotetrasiloxanetetraol in ammonia medium. The structure of L-PPSQ was fully confirmed by a combination of physicochemical analysis methods: 1H, 29Si NMR, IR spectroscopy, HPLC, powder XRD, and viscometry in solution. For the first time, a high molecular weight of the polymer (Mn = 238 kDa, Mw = 540 kDa) was achieved, which determines its improved mechanical properties and high potential for use in membrane separation. Using TGA and mechanical analysis methods, it was found that this polymer has high thermal (Td5% = 537 °C) and thermal-oxidative stability (Td5% = 587 °C) and good mechanical properties (Young's module (E) = 1700 MPa, ultimate tensile stress (σ) = 44 MPa, elongation at break (ε) = 6%), which is important for making membranes workable under various conditions. The polymer showed a high separation factor for a mixture of 10% wt. benzene in n-hexane (126) at a benzene flow of 33 g/(m2h).
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Affiliation(s)
- Tatiana S. Anokhina
- V. Topchiev Institute of Petrochemical Synthesis RAS, 119991 Moscow, Russia; (E.A.G.); (I.L.B.); (A.V.V.)
| | - Tatyana O. Ershova
- N. Nesmeyanov Institute of Organoelement Compounds RAS, 119334 Moscow, Russia; (T.O.E.); (A.M.M.)
- The Faculty of Natural Sciences, Tula State Lev Tolstoy Pedagogical University, 300026 Tula, Russia
| | - Anton A. Anisimov
- N. Nesmeyanov Institute of Organoelement Compounds RAS, 119334 Moscow, Russia; (T.O.E.); (A.M.M.)
- The Faculty of Natural Sciences, Tula State Lev Tolstoy Pedagogical University, 300026 Tula, Russia
- Moscow Institute of Physics and Technology, Faculty of Electronics, Photonics and Molecular Physics, National Research University, 141700 Dolgoprudny, Russia
| | - Maxim N. Temnikov
- N. Nesmeyanov Institute of Organoelement Compounds RAS, 119334 Moscow, Russia; (T.O.E.); (A.M.M.)
- The Faculty of Natural Sciences, Tula State Lev Tolstoy Pedagogical University, 300026 Tula, Russia
| | - Evgenia A. Grushevenko
- V. Topchiev Institute of Petrochemical Synthesis RAS, 119991 Moscow, Russia; (E.A.G.); (I.L.B.); (A.V.V.)
| | - Ilya L. Borisov
- V. Topchiev Institute of Petrochemical Synthesis RAS, 119991 Moscow, Russia; (E.A.G.); (I.L.B.); (A.V.V.)
| | - Alexey V. Volkov
- V. Topchiev Institute of Petrochemical Synthesis RAS, 119991 Moscow, Russia; (E.A.G.); (I.L.B.); (A.V.V.)
| | - Aziz M. Muzafarov
- N. Nesmeyanov Institute of Organoelement Compounds RAS, 119334 Moscow, Russia; (T.O.E.); (A.M.M.)
- Enikolopov Institute of Synthetic Polymeric Materials RAS, 117393 Moscow, Russia
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Marmo AC, Grunlan MA. Biomedical Silicones: Leveraging Additive Strategies to Propel Modern Utility. ACS Macro Lett 2023; 12:172-182. [PMID: 36669481 PMCID: PMC10848296 DOI: 10.1021/acsmacrolett.2c00701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 01/18/2023] [Indexed: 01/21/2023]
Abstract
Silicones have a long history of use in biomedical devices, with unique properties stemming from the siloxane (Si-O-Si) backbone that feature a high degree of flexibility and chemical stability. However, surface, rheological, mechanical, and electrical properties of silicones can limit their utility. Successful modification of silicones to address these limitations could lead to superior and new biomedical devices. Toward improving such properties, recent additive strategies have been leveraged to modify biomedical silicones and are highlighted herein.
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Affiliation(s)
- Alec C. Marmo
- Department
of Materials Science and Engineering Texas
A&M University, College
Station, Texas 77843-3003, United States
| | - Melissa A. Grunlan
- Department
of Biomedical Engineering, Department of Materials Science and Engineering,
Department of Chemistry Texas A&M University, College Station, Texas 77843-3003, United
States
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Kondo SI, Ito M, Ogawa H, Fujiwara W, Katagiri H. Synthesis and Characterization of Cyclotri- and Tetrasiloxanes with Pyrenyl Groups. ACS OMEGA 2022; 7:44398-44406. [PMID: 36506124 PMCID: PMC9730752 DOI: 10.1021/acsomega.2c06076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 11/08/2022] [Indexed: 06/17/2023]
Abstract
Cyclosiloxanes directly bearing polyaromatic groups on silicon atoms have scarcely been reported. Herein, hexa(1-pyrenyl)cyclotrisiloxane (2) and octa(1-pyrenyl)cyclotetrasiloxane (3) were successfully prepared from di(1-pyrenyl)silanediol (1) in the presence of a weak base such as tetraethylammonium acetate and triethylamine in MeCN. The structure of the cyclosiloxanes bearing multiple pyrenyl groups in the solid and solution states was evaluated by NMR, X-ray crystallography, and density functional theory (DFT) calculations. All pyrenyl groups of 2 were oriented outward, and no π-π stacking of adjacent pyrenyl groups was observed. However, all pairs of adjacent pyrenyl groups at 1- and 3-positions in 3 are oriented in the same direction and were π-π stacked with respect to each other. The UV-vis spectra of 2 and 3 in organic solvents showed a slight broadening of the peaks, as observed for typical pyrene derivatives. Interestingly, the fluorescence spectra of 2 showed small monomer and strong excimer emissions; however, those of 3 showed only a strong excimer emission in all solvents. Partially pyrenylated cyclotri- and tetrasiloxanes (compounds 4 and 5) showed solvent-dependent monomer and excimer spectra as observed for di(1-pyrenyl)silane derivatives, implying that the excimer emissions of 2 and 3 arise from mainly geminal and vicinal pyrenyl groups, respectively.
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Affiliation(s)
- Shin-ichi Kondo
- Department
of Chemistry, Faculty of Science, Yamagata
University, 1-4-12 Kojirakawa-machi, Yamagata-shi, Yamagata990-8560, Japan
| | - Marin Ito
- Department
of Chemistry, Faculty of Science, Yamagata
University, 1-4-12 Kojirakawa-machi, Yamagata-shi, Yamagata990-8560, Japan
| | - Hiroki Ogawa
- Department
of Chemistry, Faculty of Science, Yamagata
University, 1-4-12 Kojirakawa-machi, Yamagata-shi, Yamagata990-8560, Japan
| | - Wataru Fujiwara
- Graduate
School of Science and Engineering, Yamagata
University, 4-3-16 Jonan, Yonezawa, Yamagata992-8510, Japan
| | - Hiroshi Katagiri
- Graduate
School of Science and Engineering, Yamagata
University, 4-3-16 Jonan, Yonezawa, Yamagata992-8510, Japan
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Goncharova IK, Kutumov SP, Novikov RA, Shiryaeva TY, Volodin AD, Korlyukov AA, Arzumanyan AV. The selective synthesis of di- and cyclosiloxanes bearing several hidden p-tolyl-functionalities. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Ershova TO, Anisimov AA, Temnikov MN, Novikov MA, Buzin MI, Nikiforova GG, Dyuzhikova YS, Ushakov IE, Shchegolikhina OI, Muzafarov AM. A Versatile Equilibrium Method for the Synthesis of High-Strength, Ladder-like Polyphenylsilsesquioxanes with Finely Tunable Molecular Parameters. Polymers (Basel) 2021; 13:4452. [PMID: 34961003 PMCID: PMC8705838 DOI: 10.3390/polym13244452] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 12/08/2021] [Accepted: 12/14/2021] [Indexed: 11/22/2022] Open
Abstract
A versatile equilibrium method for synthesizing ladder-like polyphenylsilsesquioxanes (L-PPSQs) with various molecular weights (from 4 to 500 kDa) in liquid ammonia was developed. The effect of diverse parameters, such as temperature, monomer concentration, reaction time, addition or removal of water from the reaction medium, on the polycondensation process was determined. The molecular weight characteristics and structure of the L-PPSQ elements obtained were determined by GPC, 1H, 29Si NMR, IR spectroscopy, viscometry, and PXRD methods. The physicochemical properties of L-PPSQs were determined by TGA and mechanical analyses.
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Affiliation(s)
- Tatyana O. Ershova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia; (T.O.E.); (M.I.B.); (G.G.N.); (Y.S.D.); (I.E.U.); (O.I.S.); (A.M.M.)
| | - Anton A. Anisimov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia; (T.O.E.); (M.I.B.); (G.G.N.); (Y.S.D.); (I.E.U.); (O.I.S.); (A.M.M.)
| | - Maxim N. Temnikov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia; (T.O.E.); (M.I.B.); (G.G.N.); (Y.S.D.); (I.E.U.); (O.I.S.); (A.M.M.)
| | - Maxim A. Novikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Pr., 119991 Moscow, Russia;
| | - Mikhail I. Buzin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia; (T.O.E.); (M.I.B.); (G.G.N.); (Y.S.D.); (I.E.U.); (O.I.S.); (A.M.M.)
| | - Galina G. Nikiforova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia; (T.O.E.); (M.I.B.); (G.G.N.); (Y.S.D.); (I.E.U.); (O.I.S.); (A.M.M.)
| | - Yulia S. Dyuzhikova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia; (T.O.E.); (M.I.B.); (G.G.N.); (Y.S.D.); (I.E.U.); (O.I.S.); (A.M.M.)
| | - Ivan E. Ushakov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia; (T.O.E.); (M.I.B.); (G.G.N.); (Y.S.D.); (I.E.U.); (O.I.S.); (A.M.M.)
| | - Olga I. Shchegolikhina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia; (T.O.E.); (M.I.B.); (G.G.N.); (Y.S.D.); (I.E.U.); (O.I.S.); (A.M.M.)
| | - Aziz M. Muzafarov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia; (T.O.E.); (M.I.B.); (G.G.N.); (Y.S.D.); (I.E.U.); (O.I.S.); (A.M.M.)
- N. S. Enikolopov Institute of Synthetic Polymeric Materials, Russian Academy of Sciences, 117393 Moscow, Russia
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